Liquid-operated damper-regulator.



S. P. 6L J. W. BELT. LIQUID OPERATED DAMPER REGULATOR. APPLIGATION FILED11110.11, 1911. 1111111311111) 11111.29. 1913.

1,071,864. Patented Sept. 2, 1913.

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UNITE@ PATENT @lll`lt}lii.

SAMUEL I. BELT, 0F CHEBRYDALE, VIRGINIA, AND JOSEPH W. BELT, OFOKLAHOMA, OKLAHOMA.

LIQUID-OPERATED DAMPER-REGULATOR.

Specification of Letters Patent.

Application filed. December 2, 1911, Serial No. 663,583. Renewed January29, 1913. Serial No. 745,006.

To (lA/l whom it may concern Be it known that we, Santini. l?. Buur andJesi-irrt YJ. liner, citizens ol the United States, residing atCherrydale, Virginia, and at )klahoina, Oklahoma, respectively, haveinvented certain new and use'tul ,lmproveinents in Liquid-OperatedDamper- Regulators, olil which the following is a specitication.

rl`his invention relates to damper regulators, and especially to meansfor operating dra'tt dampers ot steam boilers.

The object of the invention is to provide means 'for operating dempersby water pressure itroin a` boiler so that a damper may be operated atthe least variable steam pressure ot' the boiler.

A further object of the invention is to jin'ovide in a device Yforoperating dampers by water or other' fluid pressure, such novel andpeculiar construction and arrangement o't parts as will insure theoperation of the damper during the least variable steam pressure ot theboiler, and which will equalize the water pressure on certain parts oitthe device, and thereby avoid friction between said parts in adamper-working operation.

A still further object of the invention to provide, in a damperoperating device, a special cylinder having water connections with asteam boiler and with a damper cylinder, and a special piston 't'orcirculating the Vater to and :from the damper cylinder through thepiston cylinder.

Various other objects, advantages, and improved results are attainablein the practical application and working ot the invention.

In the accompanying drawings :forming part ot this application: Figure 1is a side elevation, showing the application ot' the invention. Fig. 2is a central vertical section. Fig. 3 is a perspective view of thepiston. Fig. l is a perspective view ol' the pistoncylinder.

The saine reference characters denote the saine parts throughout theseveral views otf the drawings.

ln carrying out our invention we employ a damper cylinder l, having apiston 2, and a piston rod or stern 3, connected with an ordinary damperl, by a lever la, and a link 9.a. rlhe lower end of the cylinder l isprovided with a pipe nipple or coupling 5, and said cylinder issupported by a base G attached to and j n'ojeeting Yli'rom a steam chest7, the parts ot which are secured together by suitable bolts S, so as tosecure a diaphragm t) within the steam chest, which is supplied withsteam by means ot a pipe l0, from a steam boiler 5, so that the steampressure o'l` thc boiler is Inade against the under side ot thediaphragm. A cylinder l1 projects from the upper portion o't the steamchest, and such cylinder has a water induction port 12, and a waterexhaust port- 123. Pipes l-it and l5 lead to and lrom the ports l2 and1S resjfiectively, :tor supplying water or other motive Huid to thecylinder ll, and said pipes may be connected with the water-leg o't theboiler, or with such other source ojt liquid supply as desired. A waterchannel or duct .lli is 'formed on the cylinder 1l, and said ductconnects a water port 1,7 with a water port 13. The ports 17 and 1S are:termed in the cylinder ll, out of the diametrical lines ol the ports'l2 and 13, respectively, and the upper portion ot the duct lt has anipple if), lor a pipe Q0, which is attached to the nipple 5, so thatthe pipe 20 is in constant communication with the duet '1(5, oppositethe port i7, and the duct is in constant communication with the port 1S.

llaving provided a special cylinder, as above described, we provide saidcylinder ll with a special piston 21. having a. stein 22 working in andadjustable at: the top ot the cylinder ll by means ot a set screw 3".and a 'follower' -il 'lhe piston is cushioned at the top by means oi. aspiral spring 22 seated on a shoulder 9?) ot the piston, and workingagainsty the 'tollower, and the piston has a disk-head Z-lworking in theupper portion ot the steam chest T, and engaged by the diaphragm l)-t'or operating the piston. In order to establish communication betweenthe ports l2 and f1.7, and communication between the ports l?) and i153,the piston Vis provided with an upper annular groove 25, and a lowerannular groove 2G. lhc groove 25 jtornis an induction water channelthrough the cylinder tl, and the groove 2G 'forms a water exhaust orreturn channel through the cylinder to the boiler. The grooves are atleast twice the width ot' thc ports 12, 1?, 1T and 1S, so that duringthe oper-attimi ol the piston the ports Vl?) and A17 arc opened andclosed with respect to the grooves Q5 and QG without closing the ports12 and 18, whereby the piston is perfectly balanced laterally under thepressure of Water to and from the cylinder 11. @Wing to the relativearrangement of the ports With respect to the pist-on channels, and whenthe stroke of the piston is properly adjusted, the channel 25 is neverout of communication with the port 12, and the channel 2G is never outof communication With the port 18, so that an upward movement of thepiston, under pressure of steam on the diaphragm, Will close the damper,and a reverse movement of the piston, by reason of loiv steam pressure,Will open the damper.

t should be understood that various mechanical changes and variationsmay be made in the practical construction and application of theinvention, and that the size, shape, and material may be modified,Without departing` from the spirit of the invention as expressed in theclaims to follow.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent is Tl e combination with a fluid-operateddamper for steam boilers, a piston connected With the damper, and acylinder for the damper-piston, of a cylinder having a steam chestconnected With the boiler', a pair of fluid-ports on opposite sides ofthis cylinder above the steam chest, the ports on one side being out ofthe horizontal plane of the ports on the other side and adapted tosupply motive fiuid, a fluid duct in the Wall of the ported cylinder forconnecting the ports on the other side, a pipe connecting said duct withthe damper-cylinder, a piston having` annular fluid channels coperatingwith the said ports so as to be balanced by fluid pressure through theported cylinder, a piston-head Working in the steam chest and closing'communication between the chest and the ported cylinder, and means forcushioning the channeled piston.

Witness whereof We hereunto set our hands in the presence of twoWitnesses.

SAMUEL P. BELT. JOSEPH W. BELT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissnner of Patents,

Washington, D. C.

